Door-lock indicator



Julie 29, 1937. M. RAMLAU 2,085,331

DOOR LOCK INDICATOR Filed June 11,- 1935 INVENTOR MARIE RRMLAU ATTORN EY Patented June 29, 1937 UNITED STATES PATENT OFFICE DOOR-LOCK INDIGATOR Marie Bamlau, Cleveland, Ohio application June 11, 1935, Serial No. 26,026

and aims to provide certain new and useful im-' provements in connection with devices of this character.

It is a well appreciated fact that at night, in the dark, difficulties are often encountered in unlocking locks of house doors, automobile doors, etc. This is due to the fact that the small key holes of modern locks are hardly visible in the dark and that therefore the keys for the locks must be fitted by mere sensing, a method rather complicated and unsatisfactory.

The primary object of this invention is to overcome the above named difficulties in unlockmg of locks in the dark in a simple, effective and economic manner, by providing visible, light radiating means at or around the key hole of a lock, so as to visibly indicate the key hole and permit of a key being readily and easily fitted into its key hole without any difficulty at any time.

This object and the above enumerated advantages of my invention, as well as others not set forth, will be readily apparent from the following detailed description of the accompanying drawing, wherein:

Figure 1 is a fragmentary front view of a house door embodying a cylinder lock having its exposed front end encircled by a light radiating lock attachment according to the invention.

Figure 2 is a perspective view of the attachment shown in Figure 1.

Figure 3 is a longitudinal sectional view through the attachment.

Figures 4 through 6 showthe individual parts of the attachment before its assembly.

Thus Figure 4 is a sectional view through the base member supporting the light radiating member.

. Figure 5 is a sectional view through the light radiating member; and

Figure 6 is a sectional view through the radiating member supported by the base member.

In the particular exemplification of the inven- 45 tion, asillustrated in Figures 1 through 6 of the drawing, the light radiating means for the lock is shown as an attachment member 3 applied to a cylinder lock 4, by aligning this member with the cylinder 5 of the lock and attaching the member in any suitable manner to the lock rail 6 of a door 1, carrying the lock 4. This attachment member embodies a ring-shaped base 8, having oppositely arranged ear portions 9, which portions are perforated at ill to permit 5 of the attachment of the base ring to the lock rail 6 by means of screws ll. Preferably, as shown, the base ring 8 is recessed and forms a seat I! for a light radiating ring member H, embodying a ring-shaped disc l5 of transparent 10 Weather resisting material, such as glass or mica, which disc is lined with a layer [6 of phosphorescent material and has its inner edge reenforced and strengthened by a ferrule IS. The ring member I4 is firmly held in the base ring 16 8 by means of a wire split ring H.

The described lock attachment will clearly indicate in the dark the position of the revolving plug of the lock 4 and also furnish sufflcient light'to permit of a key being readily fitted into 20 the key hole in the revolving plug.

While I have shown and described what I believe to be the simplest and best construction of my invention, the same may be altered in certain details without, however departing from the 25 spirit of my invention.

What I claim is:

As an article of manufacture for indicating door-locks in the dark a door-lock indicator comprising a cylindrical base member having at 30 its upper edge a narrow, inwardly extending annular flange and at its lower edge outwardly extending symmetrically arranged fastening means, a phosphorescent ring member arranged within said member and resting with its upper 35 face against the annular flange thereof and a locking ring within said base member engaging the lower face of said ring member, said ring member and said locking ring being arranged within the upper portion of said base member and said ring member having its inner edge reenforced by a ferrule and being arranged a substantial distance above said fastening means to permit of proper mounting of said indicator on a door rail and alignment of said ferrule with the forwardly extended face of a cylindrical lock mounted in said door rail.

MARIE RAMLAU. 

